作用:

业务开发时,路由这个概念无论对于前后端来说肯定是不可缺少的

前端的vue-router就是很经典的路由模式

示例:

        //这里模拟实现一个vue
        class Vue{
            constructor(options){
               Object.keys(options).forEach(item=>{
                this[item] = options[item]
               })
            }
            $mount(node){
               console.log(`挂载到${node}节点上`)
               return this
            }
            static use(plugin){
               console.log(`vue使用${plugin}插件`)
            }
        }
    
        class VueRouter{
            constructor(options){
             this.routes = options.routes
            }
            push(){}
        }
        Vue.use(VueRouter)
        const Home = {name:'Home组件'}
        const About = {name:'About组件'}
        const Wjt = {name:'Wjt组件'}

        
        //路由会依次匹配
        const routes = [
            {
                path: '/about',
                component: About
            },
            {
                path: '/wjt',
                component: Wjt
            },
            {
                path: '/',
                component: Home
            }
        ]

        const router = new VueRouter({
            routes
        })

        const app =  new Vue({
            router,
            render: h => h(App)
        }).$mount('#app')

        console.log(app,'模拟的vue')